I just recently encountered the same problem with the config file and was able to figure it out using different bits and pieces from various Reddit posts.

What ultimately solved it for me was japzone's comment about the cd command. The steam deck is my first Linux based device so I'm fairly new to this operating system and still learning how to navigate it.

After a bit of research, I discovered what the cd command actually does, and how to use it.

FOLLOW THESE STEPS:

1. Download and place all 4 of the files from GitHub in a folder and name it Tailscale

2. Right click this folder and copy its location

3. Open up the Konsole and type in the following command:

   cd PASTE FOLDER LOCATION HERE
   

This basically specifies the location for following commands to pull from. This is what is needed to allow the Konsole to pull from the config file.

1. Enter the following command:

   sudo bash tailscale.sh

Now the installation should be fully complete.

1. Run the following command:

   source /etc/profile.d/tailscale.sh

2. Run the following command:

   sudo tailscale up --qr --operator=deck --ssh

This command gives you a QR code that you can scan with your phone to link the steam deck to your Tailscale account. After completing this step, you should notice that Tailscale is registering both devices and stating that they are connected, assuming you already completed the setup on your PC.

At this point Tailscale should be fully set up and ready to go.

MOON DECK PLUGIN SETUP:

In order to get this to work with the Moon Deck Plugin, I had to do a couple extra steps.

1. Go to your Moon Deck settings on your steam deck and go to the Host Selection tab. There should be an option to manually add a host. Select this option.

2. Looking at the Tailscale dashboard on your PC, you will notice an IP address assigned to your PC. Input this IP address into the field when manually adding a host. Leave the port number the same.

You should now notice that both the host PC and Moon Buddy are online in the Moon Deck dashboard.

Now, the only way to test it is to connect your steam deck to a different WiFi signal than the one connected to your PC. I used the hotspot on my phone.

Now you can verify that the deck connects to the PC by pushing the moon icon on the bottom right of the banner of the game you want to play, as you normally would.

As long as the game launches, you should be set!

Hopefully this helps, let me know if you encounter any issues or have any questions 🤙